diff --git a/pyproject.toml b/pyproject.toml
index 0e7c449b9f..fd375f6230 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -51,7 +51,7 @@ dependencies = [
   "google-cloud-spanner>=3.56,<4",                          # For Spanner database
   "google-cloud-speech>=2.30,<3",                           # For Audio Transcription
   "google-cloud-storage>=2.18,<4",                          # For GCS Artifact service
-  "google-genai>=1.72,<2",                                  # Google GenAI SDK
+  "google-genai>=1.72,<3",                                  # Google GenAI SDK
   "graphviz>=0.20.2,<1",                                    # Graphviz for graph rendering
   "httpx>=0.27,<1",                                         # HTTP client library
   "jsonschema>=4.23,<5",                                    # Agent Builder config validation
diff --git a/tests/unittests/models/test_interactions_utils.py b/tests/unittests/models/test_interactions_utils.py
index 118a925ab6..5453b044b0 100644
--- a/tests/unittests/models/test_interactions_utils.py
+++ b/tests/unittests/models/test_interactions_utils.py
@@ -26,12 +26,19 @@
 from google.adk.models import interactions_utils
 from google.adk.models.llm_request import LlmRequest
 from google.genai import types
-from google.genai._interactions.types.interaction import Interaction
-from google.genai._interactions.types.interaction_complete_event import InteractionCompleteEvent
-from google.genai._interactions.types.interaction_start_event import InteractionStartEvent
-from google.genai._interactions.types.interaction_status_update import InteractionStatusUpdate
 import pytest
 
+try:
+  from google.genai._interactions.types.interaction import Interaction
+  from google.genai._interactions.types.interaction_complete_event import InteractionCompleteEvent
+  from google.genai._interactions.types.interaction_start_event import InteractionStartEvent
+  from google.genai._interactions.types.interaction_status_update import InteractionStatusUpdate
+except ImportError:
+  pytest.skip(
+      "Skipping interactions API tests as the legacy google.genai._interactions module is not available (likely on google-genai v2.x).",
+      allow_module_level=True,
+  )
+
 
 class _MockAsyncIterator:
   """Simple async iterator for streaming interaction events."""